Upgrade rodio to 0.21 (#34368)

Hi all,

We just released [Rodio
0.21](https://github.com/RustAudio/rodio/blob/master/CHANGELOG.md)
🥳 with quite some breaking changes. This should take care
of those for zed. I tested it by hopping in and out some of the zed
channels, sound seems to still work.

Given zed uses tracing I also took the liberty of enabling the tracing
feature for rodio.

edit:
We changed the default wav decoder from hound to symphonia. The latter
has a slightly more restrictive license however that should be no issue
here (as the audio crate uses the GPL)

Release Notes:

- N/A

crates/audio/Cargo.toml

@@ -18,6 +18,6 @@ collections.workspace = true
 derive_more.workspace = true
 gpui.workspace = true
 parking_lot.workspace = true
-rodio = { version = "0.20.0", default-features = false, features = ["wav"] }
+rodio = { version = "0.21.1", default-features = false, features = ["wav", "playback", "tracing"] }
 util.workspace = true
 workspace-hack.workspace = true